Wang et al reported nomograms for predicting cadmium-induced renal tubular dysfunction. One nomogram is for males. The authors are from Nanjing University and Fudan University in China.
Patient selection: exposure to cadmium, primarily in rice and leaf vegetables
Parameters:
(1) age in years, from 25 to 70
(2) blood cadmium concentration in µg/L, from 0 to 80
points for age =
= (1.49111 * (age)) - 37.27777
points for blood cadmium level =
= (1.25 * (blood level))
total score =
= SUM(points for age and blood level)
Interpretation:
• minimum score: 0
• maximum score: 167.1
value of X =
= (0.048452 * (score)) - 3.6533
probability of renal tubular dysfunction =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.78.
